In this research, a transportation phenomenon of the mediator and the reaction mechanism of etching on the electrochemical etching by using mediator are clarified. Driving force for the transportation of the mediator is under the control of concentration gradient according to the diffusion. Because the electric potential in a location over lOnm from an electrode is small that it may be disregarded and the current density is proportional to an inverse number of the square root of a time. An etching shape is decided by the location with the constant equilibrium oxidizer. This conclusion was derived by the following experimental results. The current in etching process is decreasing with time and gradually approaching the equilibrium value. As the distance from an electrode to a specimen becomes smaller, the diameter of an etching region becomes larger. A cylindrical etched shape is gotten in etching process by using a cylindrical shaped electrode.
In this paper, the machining possibilities of silicon wafers by the EDM process are
described. Micro components of silicon wafer were processed by EDM process. A fine tungsten carbide rod was machined as tool electrode for EDM process. Performance was investigated utilizing serious experiments. Micro hole was process with the fine electrode using EDM drilling. Micro slots were also processed on the surface of a silicon plate by a copper section electrode. The
surface roughness of the silicon wafers in the EDM process was investigated. Array-micro-hole was machined by a tungsten carbide multi-electrode. Array micro holes on the coaxial circle were processed by a graphite-copper electrode of Dia.0.45mm. Batch production technology for economical EDM machining of micro holes were proposed.
Thread control method can promote system performance in the main purpose of this paper control system, divide by Thread CPU raise with time stage laying computer handle efficiency raise. Thread applies to the control system of the computer, the main purpose of this paper adopts the control of Thread in its procedure of image tracking and servo control system, the characteristic of utilizing Thread to carry out in step improves image Tracking and servo error rate controlled. In the main purpose of this paper compares with single thread to Thread, Thread improves Tracking pace and stabilizes time, especially vision Tracking and servo control will have a large number of materials, take to improve the system to carry out the pace so as to law this, to reach the cost and study the purpose.
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